“金莲川幕府”的形成，实现了忽必烈与汉族士大夫的沟通，也是二者政治联合的开端。
参考答案：对
Work hard, _______ you won't catch up with the other students. [ ]
A. or
B. so
C. and
D. but
SCR系统的紧急停机步骤？
